Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Āglāiă (trisyl.), ae, and Āglăĭă or Āglăĭē, f., = Ἀγλαία and Ἀγλαίη (brightness, splendor), one of the graces, Sen. Ben. 1, 3; Verg. Cat. 11, 60